Check, double check the fluid levels when hot and running on level ground, idling, after one minute and before two have elapsed. Remove excess fluid with a vacuum pump, via the dip stick. Buy a new modulator switch and re fit it (the one on the rocker cover). Return the modulator (on the box) to original position, before you break the trans. What fluid do you have in the trans? No dx fluids for w123s! I have just been recommended Transmax F in the absence of Transmax M. You may have cracked the modulator diaphragm in the trans. Check for leakage. See how you go.

Sent from my ASUS_Z00AD using Tapatalk